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Luo C, Chen X, Li P, Huang C. A Photoelectrochemical Sensor Based on DNA Bio-Dots-Induced Aggregation of AuNPs for Methionine Detection. Molecules 2023; 28:7740. [PMID: 38067471 PMCID: PMC10707855 DOI: 10.3390/molecules28237740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/17/2023] [Accepted: 11/21/2023] [Indexed: 12/18/2023] Open
Abstract
Based on DNA bio-dots-induced aggregation of gold nanoparticles (AuNPs), a methionine (Met) photoelectrochemical (PEC) sensor with CS-GSH-CuNCs/TiO2 NPs as the photoelectric conversion element and AuNPs as the specific recognition element was constructed. First, a TiO2 NPs/ITO electrode and CS-GSH-CuNCs were prepared, and then the CS-GSH-CuNCs/TiO2 NPs/ITO photosensitive electrode was obtained by self-assembly. Next, DNA bio-dots were modified to the upper surface of the electrode using a coupling reaction to assemble the DNA bio-dots/CS-GSH-CuNCs/TiO2 NPs electrode. Amino-rich DNA bio-dots were used to induce the aggregation of AuNPs on the electrode surface via Au-N interactions and prepare the AuNPs/DNA bio-dots/CS-GSH-CuNCs/TiO2 NPs electrode. Due to the fluorescence resonance energy transfer (FRET) between CS-GSH-CuNCs and AuNPs, the complexation chance of electron-hole (e--h+) pair in CS-GSH-CuNCs increased, which, in turn, led to a decrease in photocurrent intensity. When Met was present, AuNPs aggregated on the electrode surface were shed and bound to Met since the Au-S interaction is stronger than the Au-N interaction, resulting in the recovery of the photocurrent signal. Under optimal conditions, the photocurrent intensity of the PEC sensor showed good linearity with the logarithm of Met concentration in the range of 25.0 nmol/L-10.0 μmol/L with the limit of detection (LOD) of 5.1 nmol/L (S/N = 3, n = 10).
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Affiliation(s)
- Chen Luo
- Xingzhi College, Zhejiang Normal University, Lanxi 321100, China;
- College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China; (X.C.); (P.L.)
| | - Xiaoxiao Chen
- College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China; (X.C.); (P.L.)
| | - Pu Li
- College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China; (X.C.); (P.L.)
| | - Chaobiao Huang
- Xingzhi College, Zhejiang Normal University, Lanxi 321100, China;
- College of Chemistry and Materials Science, Zhejiang Normal University, Jinhua 321004, China; (X.C.); (P.L.)
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2
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Diffracted X-ray Tracking Method for Measuring Intramolecular Dynamics of Membrane Proteins. Int J Mol Sci 2022; 23:ijms23042343. [PMID: 35216461 PMCID: PMC8880040 DOI: 10.3390/ijms23042343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 02/14/2022] [Accepted: 02/17/2022] [Indexed: 02/06/2023] Open
Abstract
Membrane proteins change their conformations in response to chemical and physical stimuli and transmit extracellular signals inside cells. Several approaches have been developed for solving the structures of proteins. However, few techniques can monitor real-time protein dynamics. The diffracted X-ray tracking method (DXT) is an X-ray-based single-molecule technique that monitors the internal motion of biomolecules in an aqueous solution. DXT analyzes trajectories of Laue spots generated from the attached gold nanocrystals with a two-dimensional axis by tilting (θ) and twisting (χ). Furthermore, high-intensity X-rays from synchrotron radiation facilities enable measurements with microsecond-timescale and picometer-spatial-scale intramolecular information. The technique has been applied to various membrane proteins due to its superior spatiotemporal resolution. In this review, we introduce basic principles of DXT, reviewing its recent and extended applications to membrane proteins and living cells, respectively.
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Prados IM, Barrios-Gumiel A, de la Mata FJ, Marina ML, García MC. Magnetic nanoparticles coated with carboxylate-terminated carbosilane dendrons as a reusable and green approach to extract/purify proteins. Anal Bioanal Chem 2021; 414:1677-1689. [PMID: 34881394 PMCID: PMC8761721 DOI: 10.1007/s00216-021-03794-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 10/18/2021] [Accepted: 11/16/2021] [Indexed: 12/14/2022]
Abstract
Extraction/purification of proteins, at both analytical and industrial levels, is a limiting step that usually requires the use of organic solvents and involves tedious work and a high cost. This work proposes a more sustainable alternative based on the use of magnetic nanoparticles (MNPs) coated with carboxylate-terminated carbosilane dendrons. MNPs coated with first- and second-generation carbosilane dendrons and bare MNPs were employed for the extraction of proteins with different molecular weights and charges. Interaction of proteins with MNPs significantly varied with the pH, the protein, and the dendron generation (different sizes and number of charges in the periphery). Optimal dendron:protein molar ratios and suitable conditions for disrupting interactions after protein extraction were also researched. Second-generation dendron-coated MNPs showed 100% retention capability for all proteins when using acidic conditions. They were reused without losing magnetism or interaction capacity after a disruption of protein-dendron interactions with 0.2% SDS at 100 °C for 10 min. The capacity of dendron-coated MNPs was successfully applied to the recovery/purification of proteins from two food by-products, olive seeds and cheese whey.
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Affiliation(s)
- Isabel M Prados
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871, Alcalá de Henares, Madrid, Spain
| | - Andrea Barrios-Gumiel
- Departamento Química Orgánica y Química Inorgánica, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871, Alcalá de Henares, Madrid, Spain
| | - Francisco J de la Mata
- Departamento Química Orgánica y Química Inorgánica, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871, Alcalá de Henares, Madrid, Spain.,Instituto de Investigación Química "Andrés M. del Rio" (IQAR), Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871, Alcalá de Henares, Madrid, Spain.,Networking Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - M Luisa Marina
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871, Alcalá de Henares, Madrid, Spain.,Instituto de Investigación Química "Andrés M. del Rio" (IQAR), Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871, Alcalá de Henares, Madrid, Spain
| | - M Concepción García
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871, Alcalá de Henares, Madrid, Spain. .,Instituto de Investigación Química "Andrés M. del Rio" (IQAR), Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871, Alcalá de Henares, Madrid, Spain.
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4
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Cai Y, Zhang S, Dong C, Yang J, Ma T, Zhang H, Cui Y, Hui W. Lateral flow immunoassay based on gold magnetic nanoparticles for the protein quantitative detection: Prostate-specific antigen. Anal Biochem 2021; 627:114265. [PMID: 34062149 DOI: 10.1016/j.ab.2021.114265] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/24/2021] [Accepted: 05/26/2021] [Indexed: 11/18/2022]
Abstract
Point-of-care testing (POCT) demands for rapidly obtaining test results by means of portable analytical instruments and auxiliary reagents at the sampling site. It's important for tumor marker to be recognized and detected in early clinical diagnosis. Many studies focused on producing small portable devices that would allow fast, accurate, and on-site detection. This study aimed to report a magnetic quantitative lateral flow immunoassay (LFIA) system based on poly (acrylic acid) (PAA)-modified gold magnetic nanoparticles (PGMNs) for detecting prostate-specific antigen (PSA) qualitatively and quantitatively. The result was easily achievable with a portable magnetic reader within 15 min. Under optimal conditions, as low as 0.17 ng/mL PSA could be detected. The method was validated using a well-established Solin electrochemiluminescence immunoassay and showed high consistency in detecting 84 serum samples (R2 = 0.98). The quantitative LFIA based on PGMNs established in this study was proven to be rapid, accurate, sensitive, and inexpensive. As a POCT, it can be potentially developed for the quantitative diagnosis of other disease-related protein biomarkers.
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Affiliation(s)
- Yu Cai
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China
| | - Shanshan Zhang
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China
| | - Chen Dong
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China
| | - Jiangcun Yang
- Department of Blood Transfusion, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 710069, China
| | - Ting Ma
- Department of Blood Transfusion, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 710069, China
| | - Hua Zhang
- Department of Oncology, Shaanxi Provincial People's Hospital, Xi'an, Shaanxi, 710069, China
| | - Yali Cui
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China.
| | - Wenli Hui
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China.
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5
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A sensitive electrochemical method for indole based on the signal amplification strategy by gold/iron-oxide composite nanoparticles. Anal Chim Acta 2021; 1142:56-64. [PMID: 33280704 DOI: 10.1016/j.aca.2020.10.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 10/26/2020] [Accepted: 10/28/2020] [Indexed: 12/13/2022]
Abstract
Indole is a major metabolite of tryptophan, which plays an important role in the intestinal microecological balance and human physiological activities. The determination of indole becomes important for its researches. So, it is urgent to establish a sensitive and cost-effective method for indole detection. Herein, a sensitive electrochemical method was constructed to determine the concentration of indole using screen-printed carbon electrode (SPCE) with the signal amplification strategy by gold/iron-oxide composite nanoparticles (Au/Fe3O4). Au/Fe3O4 nanoparticles were successfully synthesized under the irradiation by high-energy electron beams. 4-aminothiophenol (4-ATP) was connected to Au/Fe3O4 via Au-S bond. And then NaNO2 reacted with 4-ATP to form the azo bond, which could form the final product of Au/Fe3O4@ATP-azo-indole by the coupling reaction. Thus, the concentration of indole was detected by the electrochemical signal produced by Au/Fe3O4@ATP-azo-indole indirectly. The detection sensitivity was greatly improved by the large specific surface area provided by Au/Fe3O4 after the modification. The linear range of indole was from 0.50 to 120.00 μg L-1 and the limit of detection (LOD) was as low as 0.10 μg L-1 (S/N = 3). Furthermore, the developed method exhibited acceptable intra-day and inter-day precisions with the coefficient of variations (CV) less than 4.9% and 8.2%, respectively. And the recoveries were from 97.2% to 105.4%. An innovative, sensitive, cost-effective method was established for indole determination in human plasma matrix in this manuscript, which provides a promising way for indole detection in conventional laboratories.
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6
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González-García E, Marina ML, García MC. Nanomaterials in Protein Sample Preparation. SEPARATION & PURIFICATION REVIEWS 2019. [DOI: 10.1080/15422119.2019.1581216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Estefanía González-García
- Departamento de Química Analítica, Química Física e Ingeniería Química, Instituto de Investigación Química “Andrés M. del Río” (IQAR), Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - María Luisa Marina
- Departamento de Química Analítica, Química Física e Ingeniería Química, Instituto de Investigación Química “Andrés M. del Río” (IQAR), Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - María Concepción García
- Departamento de Química Analítica, Química Física e Ingeniería Química, Instituto de Investigación Química “Andrés M. del Río” (IQAR), Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
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7
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Dong H, Sarkes DA, Rice JJ, Hurley MM, Fu AJ, Stratis-Cullum DN. Living Bacteria-Nanoparticle Hybrids Mediated through Surface-Displayed Peptides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:5837-5848. [PMID: 29692178 DOI: 10.1021/acs.langmuir.8b00114] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In this study, we investigated the preparation of living bacteria-nanoparticle hybrids mediated by surface-displayed peptides. The assembly of metallic nanoparticles on living bacteria has been achieved under mild conditions utilizing metal-peptide interactions, whereas the viability of the bacterial cells was greatly preserved. Escherichia coli was engineered with inducible gene circuits to control the display of peptides with desired sequences. Several designed peptide sequences as well as known gold-binding peptides were expressed on the cell surface using enhanced circularly permuted outer membrane protein X (eCPX) scaffolds. Driven by metal-peptide affinity, "biofriendly" citrate-stabilized gold nanoparticles were self-assembled onto the surface of bacteria with displayed peptides, which required overcoming the repulsive force between negatively charged nanoparticles and negatively charged cells. The bacteria/Au nanoparticle hybrids were highly viable and maintained the ability to grow and divide, which is a crucial step toward the creation of living material systems. Further activity and preservation of the bacterial hybrid assembly was demonstrated. The method described herein enables the conjugation of bacterial surfaces with diverse metal-rich nanoparticles in an inducible, and therefore easily controlled, manner. The expressed peptide sequences can be easily modified to alter the binding affinity and specificity for a wide variety of materials to form on-demand, high-density living biohybrids.
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Affiliation(s)
- Hong Dong
- Biotechnology Branch , US Army Research Laboratory , 2800 Powder Mill Road , Adelphi , Maryland 20783 , United States
- General Technical Services , 1451 Route 34 South , Wall Township , New Jersey 07727 , United States
| | - Deborah A Sarkes
- Biotechnology Branch , US Army Research Laboratory , 2800 Powder Mill Road , Adelphi , Maryland 20783 , United States
| | - Jeffrey J Rice
- Department of Chemical Engineering , Auburn University , 212 Ross Hall , Auburn , Alabama 36849 , United States
- Oak Ridge Associated Universities , 4692 Millennium Drive, Suite 101 , Belcamp , Maryland 21017 , United States
| | - Margaret M Hurley
- Biotechnology Branch , US Army Research Laboratory , 2800 Powder Mill Road , Adelphi , Maryland 20783 , United States
| | - Adele J Fu
- Biotechnology Branch , US Army Research Laboratory , 2800 Powder Mill Road , Adelphi , Maryland 20783 , United States
- Oak Ridge Associated Universities , 4692 Millennium Drive, Suite 101 , Belcamp , Maryland 21017 , United States
| | - Dimitra N Stratis-Cullum
- Biotechnology Branch , US Army Research Laboratory , 2800 Powder Mill Road , Adelphi , Maryland 20783 , United States
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8
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Mosayebi J, Kiyasatfar M, Laurent S. Synthesis, Functionalization, and Design of Magnetic Nanoparticles for Theranostic Applications. Adv Healthc Mater 2017; 6. [PMID: 28990364 DOI: 10.1002/adhm.201700306] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 06/14/2017] [Indexed: 12/13/2022]
Abstract
In order to translate nanotechnology into medical practice, magnetic nanoparticles (MNPs) have been presented as a class of non-invasive nanomaterials for numerous biomedical applications. In particular, MNPs have opened a door for simultaneous diagnosis and brisk treatment of diseases in the form of theranostic agents. This review highlights the recent advances in preparation and utilization of MNPs from the synthesis and functionalization steps to the final design consideration in evading the body immune system for therapeutic and diagnostic applications with addressing the most recent examples of the literature in each section. This study provides a conceptual framework of a wide range of synthetic routes classified mainly as wet chemistry, state-of-the-art microfluidic reactors, and biogenic routes, along with the most popular coating materials to stabilize resultant MNPs. Additionally, key aspects of prolonging the half-life of MNPs via overcoming the sequential biological barriers are covered through unraveling the biophysical interactions at the bio-nano interface and giving a set of criteria to efficiently modulate MNPs' physicochemical properties. Furthermore, concepts of passive and active targeting for successful cell internalization, by respectively exploiting the unique properties of cancers and novel targeting ligands are described in detail. Finally, this study extensively covers the recent developments in magnetic drug targeting and hyperthermia as therapeutic applications of MNPs. In addition, multi-modal imaging via fusion of magnetic resonance imaging, and also innovative magnetic particle imaging with other imaging techniques for early diagnosis of diseases are extensively provided.
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Affiliation(s)
- Jalal Mosayebi
- Department of Mechanical Engineering; Urmia University; Urmia 5756151818 Iran
| | - Mehdi Kiyasatfar
- Department of Mechanical Engineering; Urmia University; Urmia 5756151818 Iran
| | - Sophie Laurent
- Laboratory of NMR and Molecular Imaging; University of Mons; Mons Belgium
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9
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Zhang X, Zhang Q, Ma T, Liu Q, Wu S, Hua K, Zhang C, Chen M, Cui Y. Enhanced Stability of Gold Magnetic Nanoparticles with Poly(4-styrenesulfonic acid-co-maleic acid): Tailored Optical Properties for Protein Detection. NANOSCALE RESEARCH LETTERS 2017; 12:547. [PMID: 28948523 PMCID: PMC5612896 DOI: 10.1186/s11671-017-2303-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 09/04/2017] [Indexed: 06/07/2023]
Abstract
Gold magnetic nanoparticles (GoldMag) have attracted great attention due to their unique physical and chemical performances combining those of individual Fe3O4 and Au nanoparticles. Coating GoldMag with polymers not only increases the stability of the composite particles suspended in buffer but also plays a key role for establishing point-of-care optical tests for clinically relevant biomolecules. In the present paper, poly(4-styrenesulfonic acid-co-maleic acid) (PSS-MA), a negatively charged polyelectrolyte with both sulfonate and carboxylate anionic groups, was used to coat the positively charged GoldMag (30 nm) surface. The PSS-MA-coated GoldMag complex has a stable plasmon resonance adsorption peak at 544 nm. A pair of anti-D-dimer antibodies has been coupled on this GoldMag composite nanoparticle surface, and a target protein, D-dimer was detected, in the range of 0.3-6 μg/mL. The shift of the characteristic peak, caused by the assembly of GoldMag due to the formation of D-dimer-antibody sandwich bridges, allowed the detection.
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Affiliation(s)
- Xiaomei Zhang
- College of Life Sciences, Northwest University, Xi’an, 710069 China
- College of Agricultural, Henan University of Science and Technology, Luoyang, 471003 China
| | - Qinlu Zhang
- School of Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, 710061 China
| | - Ting Ma
- College of Life Sciences, Northwest University, Xi’an, 710069 China
| | - Qian Liu
- College of Life Sciences, Northwest University, Xi’an, 710069 China
| | - Songdi Wu
- No. 1 Hospital of Xi’an City, Xi’an, 710068 China
| | - Kai Hua
- College of Life Sciences, Northwest University, Xi’an, 710069 China
| | - Chao Zhang
- College of Life Sciences, Northwest University, Xi’an, 710069 China
| | - Mingwei Chen
- School of Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, 710061 China
| | - Yali Cui
- College of Life Sciences, Northwest University, Xi’an, 710069 China
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10
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Chitosan and carboxymethyl cellulose based magnetic nanocomposites for application of peroxidase purification. Int J Biol Macromol 2017; 96:149-160. [DOI: 10.1016/j.ijbiomac.2016.12.042] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 11/10/2016] [Accepted: 12/04/2016] [Indexed: 11/22/2022]
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11
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Jagalski V, Barker RD, Thygesen MB, Gotfryd K, Krüger MB, Shi L, Maric S, Bovet N, Moulin M, Haertlein M, Pomorski TG, Loland CJ, Cárdenas M. Grafted biomembranes containing membrane proteins--the case of the leucine transporter. SOFT MATTER 2015; 11:7707-7711. [PMID: 26325086 DOI: 10.1039/c5sm01490e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Here, we bind the sodium dependent amino acid transporter on nitrilotriacetic acid/polyethylene glycol functionalized gold sensors in detergents and perform a detergent-lipid exchange with phosphatidylcholine. We characterize the LeuT structure in the adsorbed film by magnetic contrast neutron reflection using the predicted model from molecular dynamic simulations.
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Affiliation(s)
- Vivien Jagalski
- Department of Chemistry and Nano-Science Center, University of Copenhagen, Universitetsparken 5, DK 2100, Copenhagen, Denmark.
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12
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Cheng C, Kao CY. An Electrochemical Biosensor with Uricase Immobilized on Functionalized Gold Coated Copper Wire Electrode for Urinary Uric Acid Assay. ELECTROANAL 2015. [DOI: 10.1002/elan.201500539] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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13
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Tandem affinity purification to identify cytosolic and nuclear gβγ-interacting proteins. Methods Mol Biol 2015; 1234:161-84. [PMID: 25304356 DOI: 10.1007/978-1-4939-1755-6_14] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
It has become clear in recent years that the Gβγ subunits of heterotrimeric proteins serve broad roles in the regulation of cellular activity and interact with many proteins in different subcellular locations including the nucleus. Protein affinity purification is a common method to identify and confirm protein interactions. When used in conjugation with mass spectrometry it can be used to identify novel protein interactions with a given bait protein. The tandem affinity purification (TAP) technique identifies partner proteins bound to tagged protein bait. Combined with protocols to enrich the nuclear fraction of whole cell lysate through sucrose cushions, TAP allows for purification of interacting proteins found specifically in the nucleus. Here we describe the use of the TAP technique on cytosolic and nuclear lysates to identify candidate proteins, through mass spectrometry, that bind to Gβ1 subunits.
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Seino S, Watanabe K, Shikakura T, Abe M, Nakagawa T, Koga Y, Yamamoto TA. Enzyme immobilization on gold/Fe-oxide composite nanoparticles using a methionine tag. Colloids Surf A Physicochem Eng Asp 2014. [DOI: 10.1016/j.colsurfa.2014.06.049] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Ohkubo Y, Nakagawa T, Seino S, Kugai J, Yamamoto TA, Nitani H, Niwa Y. X-ray-induced reduction of Au ions in an aqueous solution in the presence of support materials and in situ time-resolved XANES measurements. JOURNAL OF SYNCHROTRON RADIATION 2014; 21:1148-1152. [PMID: 25178005 PMCID: PMC4333730 DOI: 10.1107/s1600577514012703] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Accepted: 05/31/2014] [Indexed: 06/03/2023]
Abstract
Synchrotron X-ray-induced reduction of Au ions in an aqueous solution with or without support materials is reported. To clarify the process of radiation-induced reduction of metal ions in aqueous solutions in the presence of carbon particles as support materials, in situ time-resolved XANES measurements of Au ions were performed under synchrotron X-ray irradiation. XANES spectra were obtained only when hydrophobic carbon particles were added to the precursor solution containing Au ions. Changes in the shape of the XANES spectra indicated a rapid reduction from ionic to metallic Au in the precursor solution owing to synchrotron X-ray irradiation. In addition, the effects of the wettability of the carbon particles on the deposited Au metallic spots were examined. The deposited Au metallic spots were different depending on the relationship of surface charges between metal precursors and support materials. Moreover, a Au film was obtained as a by-product only when hydrophilic carbon particles were added to the precursor solution containing the Au ions.
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Affiliation(s)
- Yuji Ohkubo
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takashi Nakagawa
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Satoshi Seino
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Junichiro Kugai
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takao A. Yamamoto
- Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiroaki Nitani
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
| | - Yasuhiro Niwa
- Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
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Fujioka H, Tsunehiro M, Kawaguchi M, Kuramoto Y, Kurosaki H, Hieda Y, Kinoshita-Kikuta E, Kinoshita E, Koike T. Simple enrichment of thiol-containing biomolecules by using zinc(II)-cyclen-functionalized magnetic beads. J Sep Sci 2014; 37:1601-9. [DOI: 10.1002/jssc.201400135] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 03/11/2014] [Accepted: 04/02/2014] [Indexed: 01/06/2023]
Affiliation(s)
- Haruto Fujioka
- Laboratory of Organic Medicinal Chemistry; Faculty of Pharmacy & Pharmaceutical Sciences; Fukuyama University; Fukuyama Japan
| | - Masaya Tsunehiro
- Department of Functional Molecular Science; Institute of Biomedical & Health Sciences; Hiroshima University; Hiroshima Japan
| | - Maho Kawaguchi
- Department of Functional Molecular Science; Institute of Biomedical & Health Sciences; Hiroshima University; Hiroshima Japan
| | - Yasuhiro Kuramoto
- Department of Functional Molecular Science; Institute of Biomedical & Health Sciences; Hiroshima University; Hiroshima Japan
| | - Hiromasa Kurosaki
- Department of Structure-Function Physical Chemistry; Graduate School of Pharmaceutical Sciences; Kumamoto University; Kumamoto Japan
| | - Yuhzo Hieda
- Laboratory of Organic Medicinal Chemistry; Faculty of Pharmacy & Pharmaceutical Sciences; Fukuyama University; Fukuyama Japan
| | - Emiko Kinoshita-Kikuta
- Department of Functional Molecular Science; Institute of Biomedical & Health Sciences; Hiroshima University; Hiroshima Japan
| | - Eiji Kinoshita
- Department of Functional Molecular Science; Institute of Biomedical & Health Sciences; Hiroshima University; Hiroshima Japan
| | - Tohru Koike
- Department of Functional Molecular Science; Institute of Biomedical & Health Sciences; Hiroshima University; Hiroshima Japan
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Korkmaz N. Recombinant bacteriophages as gold binding bio-templates. Colloids Surf B Biointerfaces 2013; 112:219-28. [PMID: 23994747 DOI: 10.1016/j.colsurfb.2013.07.063] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 07/03/2013] [Accepted: 07/30/2013] [Indexed: 12/31/2022]
Abstract
Bacteriophages are nano-sized virion particles infecting bacteria. In this study, it is shown that metal binding properties of filamentous fd-bacteriophages can be enhanced by genetic engineering. Quartz crystal microbalance (QCM) analyses, UV-vis absorption spectra measurements and scanning electron microscopy (SEM) imaging revealed that expression of MMM short amino acid sequence on major coat protein p8 facilitates recombinant MMM-phage binding to Au surfaces and nanoparticles (NPs) via gold-sulfur (AuS) interaction. Electroless deposition of Au particles on phage assemblies was investigated upon chemical reduction reaction with NaBH4 at different HAuCl4 precursor concentrations. Energy dispersive X-ray spectroscopy (EDX) measurements confirmed the presence of Au on both AuNP decorated and chemically metallized phage structures. Further studies on patterning and controlled immobilization of recombinant bacteriophages on specific surfaces may contribute to bio-templated nanowire development field and biosensor application studies.
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Affiliation(s)
- Nuriye Korkmaz
- Convergence Bioscience Group, Nanomedicine Team, Korea Institute of Science and Technology, Europe Forschungsgesellschaft mbH, Campus E 71, D-66123 Saarbrücken, Germany.
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Yang D, Ma J, Zhang Q, Li N, Yang J, Raju PA, Peng M, Luo Y, Hui W, Chen C, Cui Y. Polyelectrolyte-coated gold magnetic nanoparticles for immunoassay development: toward point of care diagnostics for syphilis screening. Anal Chem 2013; 85:6688-95. [PMID: 23735054 DOI: 10.1021/ac400517e] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Immediate response for disease control relies on simple, inexpensive, and sensitive diagnostic tests, highly sought after for timely and accurate test of various diseases, including infectious diseases. Composite Fe3O4/Au nanoparticles have attracted considerable interest in diagnostic applications due to their unique physical and chemical properties. Here, we developed a simple coating procedure for gold magnetic nanoparticles (GMNs) with poly(acrylic acid) (PAA). PAA-coated GMNs (PGMNs) were stable and monodispersed and characterized by Fourier transform-infrared spectroscopy (FT-IR), transmission electron microscopy, UV-visible scanning spectrophotometry, thermogravimetric analysis, and Zetasizer methodologies. For diagnostic application, we established a novel lateral flow immunoassay (LFIA) strip test system where recombinant Treponema pallidum antigens (r-Tp) were conjugated with PGMNs to construct a particle probe for detection of anti-Tp antibodies. Intriguingly, the particle probes specifically identified Tp antibodies with a detection limitation as low as 1 national clinical unit/mL (NCU/mL). An ample pool of 1020 sera samples from three independent hospitals were obtained to assess our PGMNs-based LFIA strips, which exhibited substantially high values of sensitivity and specificity for all clinical tests (higher than 97%) and, therefore, proved to be a suitable approach for syphilis screening at a point-of-care test manner.
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Affiliation(s)
- Dong Yang
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China
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López-Cortés R, Oliveira E, Núñez C, Lodeiro C, Páez de la Cadena M, Fdez-Riverola F, López-Fernández H, Reboiro-Jato M, Glez-Peña D, Luis Capelo J, Santos HM. Fast human serum profiling through chemical depletion coupled to gold-nanoparticle-assisted protein separation. Talanta 2012; 100:239-45. [DOI: 10.1016/j.talanta.2012.08.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2012] [Revised: 08/09/2012] [Accepted: 08/13/2012] [Indexed: 01/23/2023]
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Colombo M, Carregal-Romero S, Casula MF, Gutiérrez L, Morales MP, Böhm IB, Heverhagen JT, Prosperi D, Parak WJ. Biological applications of magnetic nanoparticles. Chem Soc Rev 2012; 41:4306-34. [PMID: 22481569 DOI: 10.1039/c2cs15337h] [Citation(s) in RCA: 699] [Impact Index Per Article: 58.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this review an overview about biological applications of magnetic colloidal nanoparticles will be given, which comprises their synthesis, characterization, and in vitro and in vivo applications. The potential future role of magnetic nanoparticles compared to other functional nanoparticles will be discussed by highlighting the possibility of integration with other nanostructures and with existing biotechnology as well as by pointing out the specific properties of magnetic colloids. Current limitations in the fabrication process and issues related with the outcome of the particles in the body will be also pointed out in order to address the remaining challenges for an extended application of magnetic nanoparticles in medicine.
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Affiliation(s)
- Miriam Colombo
- Dipartimento di Biotecnologie e Bioscienze, Università di Milano-Bicocca, Milan, Italy
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